AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
AIDA
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Sat Mar 29 12:28:10 2025
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> MSL type BB18 serial # 2977-20 bias +100V I_L +12.45uA T=23 deg C > (biased by nnaida # 3 & 5 ) > > DSSSD - AIDA adaptor PCB cabling > > 4 off LH Coupler (Kapton PCB, 5cm), 2x 34-way Samtec ribbon cable (62cm p+n, 53cm n+n), > RH coupler(Kapton PCB, 10cm) > + 3M 1245 1.4mil copper foil screen ribbon cables (i.e. not RH & LH couplers) > + drain wires -> gold-plated Lemo-00 test input connectors > > to FEE64s in 4x FEE module crates > > 3M 1245-wrapped cables enclosed by polyethyelene bags (supplied to deliver 90cm Printech Kapton PCBs) > to ensure no electrical contact with snout, DSSSD mounting tubes, snout base etc > > Snout drain wire to FEE module Cu block > > nnaida 3 & 8 AIDA adaptor PCB rev C > nnaida 5 & 9 AIDA adaptor PCB rev C (LK1 fitted) > ground links LK3 & LK7 *not* fitted to nnaida3, 5, 8, & 9 AIDA adaptor PCBs > LK1 fitted to nnaida5 ( cf. https://elog.ph.ed.ac.uk/AIDA/190 ) > > Heavy duty copper cable connects copper front end frames of FEE modules > Nitto 5011N conductive gasket between FEE module and front end frames > > Standard ASIC settings > nnaida 3 & 8 - negative input > nnaida 5 & 9 - positive input > > Pulser BNC PB-4 > Fall time 1.0ms > Rate c.100Hz > Delay min > Amplitude 50,000 > Polarity - > Pulse top Tail > Atten 10x > + polarity via EG&G Ortec 433A Sum & Invert Amplifier > > Standard ASIC settings > > Shaping time 8us > LEC/MEC Slow com 32 (dec) > Fast com 32 (dec) > HEC Fast com 2(dec) > > Attachments 1-4 ASIC #1 waveforms from each FEE64 > 5-8 ASIC #2 spectra + 2.0.L pulser peak width > > Pulser peak widths (ch FWHM) versus shaping time ( spectrum 2.4.L ) > > tau nnaida3 nnaida5 nnaida8 nnaida9 > 8 68 60 70 62 > 4 83 49 88 48 > 2 100 47 109 43 > 1 172 60 165 42 > 0.5 380 86 309 48 > > Note: n+n ohmic strips spectra > 100 ch FWHM display non-gaussian peaks/double peaking > > 15.45 Attempted to increase detector bias from +100V to +150V > Leakage current increased ~0.5uA/V for bias > 115V > Detector bias supply trips (20uA) at +120V > Remain at detector bias +100V > > 16.17 Switch polarity of detector bias from + to - > Move LK1 from nnaida5 to nnaida3 > > tau nnaida3 nnaida5 nnaida8 nnaida9 > 8 61 64 65 61 > > n+n ohmic strips ~10% improvement, p+n junction strips no significant change > > 16.30 Fit LK3/LK7 jumpers to connect adaptor PCB ground to detector PCB ground > > tau nnaida3 nnaida5 nnaida8 nnaida9 > 8 61 64 62 60 > > No significant change to cf. previous test > > 18.30 Install second DSSSD > > Upstream 3058-6 bias +100V I_L 4.15uA > Downstream 2977-20 bias +100V I_L 11.8uA > + 207Bi source ~3cm upstream of 3058-6 > > Standard ASIC settings > shaping time 6us > slow comp 8(dec) > HEC fast comp 2(dec) > LEC/MEC fast comp 16(dec) > > Pulser peak widths ~60 ch FWHM per previous tests today > > Discriminator masks TBD > > 22.27 R2 to disk (directory /data20/TapeData/May2016) > MERGE data links 2-9 > > Run data to disk overnight. Add two more DSSSDs tomorrow. > > 09.21 R2 stopped
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